The team have long been known for the quality of their spin bowling yet Pakistan were 35 for three at Lord's on Friday before the likes of off-break ace Muttiah Muralitharan and mystery bowler Ajantha Mendis had come on.
Sri Lanka, despite being restricted to a modest 150 for seven, held Pakistan to 131 for nine as they won their opening Super Eights encounter by 19 runs.
Muralitharan did take two wickets in two balls to get rid of Misbah-ul-Haq and Shahid Afridi but unorthodox paceman Lasith Malinga weighed in with an impressive three for 17.
Minnows Ireland will try to stop the Lankans in their tracks at Lord's on Sunday with Sangakkara confident the best is yet to come from his side.
"It was a great, all-round effort to defend that total when we should have had 170 or 175," said Sangakkara.
"With better options and partnerships, we could have had a more comfortable total."
All-rounder Tillekaratne Dilshan, man-of-the-match against Pakistan for his 46 off 39 balls, added: "It w